hdu1001
Sum Problem
Time Limit: 1000/500 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 194488 Accepted Submission(s): 46632
Problem Description
Hey, welcome to HDOJ(Hangzhou Dianzi University Online Judge).
In this problem, your task is to calculate SUM(n) = 1 + 2 + 3 + ... + n.
In this problem, your task is to calculate SUM(n) = 1 + 2 + 3 + ... + n.
Input
The input will consist of a series of integers n, one integer per line.
Output
For each case, output SUM(n) in one line, followed by a blank line. You may assume the result will be in the range of 32-bit signed integer.
Sample Input
1
100
Sample Output
1
5050
Author
DOOM III
- #include<iostream>
- using namespace std;
- int main()
- {
- int n,sum,i;
- while(cin>>n)
- {
- sum=0;
- for(i=1;i<=n;i++)
- sum+=i;
- cout<<sum<<endl<<endl;
- }
- return 0;
- }